BMS control panels: what they do and how to specify one
The BMS control panel is where power, controllers and field wiring meet. What goes inside, how they are built and what to ask your contractor.
EcoNex engineering team • 22 September 2026 • 6 min read
A BMS control panel, sometimes called a motor control centre or MCP, houses the controllers, power supplies, starters and interface wiring that let a building management system run plant such as boilers, chillers, AHUs and pumps.
Get the panel right and commissioning is quick, faults are easy to trace and future changes are cheap. Get it wrong and every visit costs more than it should.
What goes inside a BMS control panel
A typical London commercial panel contains:
- Incoming isolator, protection and distribution
- BMS controllers or outstations (Trend IQ4, Distech, BACnet devices)
- Motor starters, inverters and hand/off/auto switches
- Relays, interface modules and terminal rails for field wiring
- Labelling, wiring schedules and as-built drawings
How to specify one
Start with a points schedule and control philosophy, not a panel size. Confirm the form of separation, IP rating, spare way capacity (we recommend 20%) and whether the panel must stay live while works continue elsewhere.
Ask for a factory acceptance test before delivery. A panel proven in the workshop shortens site commissioning by days.